js利用canvas绘制爱心

js代码如下：

var cav = document.getElementById("a").getContext("2d");
	function draw(x, y,c){
		cav.beginPath();
		cav.fillStyle = c;
		cav.moveTo(x, y);
		cav.lineWidth = 3;
		cav.bezierCurveTo(130 ,65,150,110,100,150);
		cav.bezierCurveTo(35,85,95,75,100,100);
		cav.closePath();
		cav.stroke();
		cav.fill();